PyQt - QTableView内组合框的最简单的工作示例

Question

背景：我找不到QTableView内的组合框的完整工作示例。所以我写了这个代码基于其他几个更人为的例子。但问题是，此示例要求您在组合框启用之前双击组合框，然后再次单击将其放下。这不是非常用户友好的。如果我使用QTableWidget执行非模型/视图事件，则第一次单击时组合框会下降。

问题：有人可以看看这个，并告诉我需要做什么才能使其响应，就像QTableWidget？此外，如果有什么我没做的事情是不必要的，请指出。例如，是否有必要引用应用程序风格？

import sys 
from PyQt4 import QtGui, QtCore 

rows = "ABCD" 
choices = ['apple', 'orange', 'banana'] 

class Delegate(QtGui.QItemDelegate): 
    def __init__(self, owner, items): 
     super(Delegate, self).__init__(owner) 
     self.items = items 
    def createEditor(self, parent, option, index): 
     self.editor = QtGui.QComboBox(parent) 
     self.editor.addItems(self.items) 
     return self.editor 
    def paint(self, painter, option, index): 
     value = index.data(QtCore.Qt.DisplayRole).toString() 
     style = QtGui.QApplication.style() 
     opt = QtGui.QStyleOptionComboBox() 
     opt.text = str(value) 
     opt.rect = option.rect 
     style.drawComplexControl(QtGui.QStyle.CC_ComboBox, opt, painter) 
     QtGui.QItemDelegate.paint(self, painter, option, index) 
    def setEditorData(self, editor, index): 
     value = index.data(QtCore.Qt.DisplayRole).toString() 
     num = self.items.index(value) 
     editor.setCurrentIndex(num) 
    def setModelData(self, editor, model, index): 
     value = editor.currentText() 
     model.setData(index, QtCore.Qt.DisplayRole, QtCore.QVariant(value)) 
    def updateEditorGeometry(self, editor, option, index): 
     editor.setGeometry(option.rect) 

class Model(QtCore.QAbstractTableModel): 
    def __init__(self): 
     super(Model, self).__init__() 
     self.table = [[row, choices[0]] for row in rows] 
    def rowCount(self, index=QtCore.QModelIndex()): 
     return len(self.table) 
    def columnCount(self, index=QtCore.QModelIndex()): 
     return 2 
    def flags(self, index): 
     return QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable 
    def data(self, index, role): 
     if role == QtCore.Qt.DisplayRole: 
      return self.table[index.row()][index.column()] 
    def setData(self, index, role, value): 
     if role == QtCore.Qt.DisplayRole: 
      self.table[index.row()][index.column()] = value 

class Main(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
     super(Main, self).__init__(parent) 
     self.model = Model() 
     self.table = QtGui.QTableView() 
     self.table.setModel(self.model) 
     self.table.setItemDelegateForColumn(1, Delegate(self, ["apple", "orange", "banana"])) 
     self.setCentralWidget(self.table) 
     self.setWindowTitle('Delegate Test') 
     self.show() 

if __name__ == '__main__': 
    app = QtGui.QApplication(sys.argv) 
    main = Main() 
    app.exec_() 

Answer 1

使用QTableWiget.setCellWidget

import sys 
from PyQt4 import QtGui 
app = QtGui.QApplication(sys.argv) 
table = QtGui.QTableWidget(1,1) 
combobox = QtGui.QComboBox() 
combobox.addItem("Combobox item") 
table.setCellWidget(0,0, combobox) 
table.show() 
app.exec() 

Answer 2

如果你正在试图调整时，视图显示编辑器，你需要按照QAbstractItemView中定义的改变编辑触发器。默认情况下是在doubleClick上进行编辑，但我认为你之后是QAbstractItemView.CurrentChanged。通过调用myView.setEditTrigger()

Answer 3

如果有人有兴趣将它设置，下面是修改PyQt5和Python 3的主要更新同样的例子包括：

• 的Python 3：super().__init__()
• PyQt5：大多数类是QtWidgets ;不需要用于此实例中
• Model.setDataQtGui：输入参数顺序改变为：index, value, role，和True返回的None现在内部Main指定
• 组合框choices和表内容代替;这使得Delegate和Model更普遍

from PyQt5 import QtWidgets, QtCore 

class Delegate(QtWidgets.QItemDelegate): 
    def __init__(self, owner, choices): 
     super().__init__(owner) 
     self.items = choices 
    def createEditor(self, parent, option, index): 
     self.editor = QtWidgets.QComboBox(parent) 
     self.editor.addItems(self.items) 
     return self.editor 
    def paint(self, painter, option, index): 
     value = index.data(QtCore.Qt.DisplayRole) 
     style = QtWidgets.QApplication.style() 
     opt = QtWidgets.QStyleOptionComboBox() 
     opt.text = str(value) 
     opt.rect = option.rect 
     style.drawComplexControl(QtWidgets.QStyle.CC_ComboBox, opt, painter) 
     QtWidgets.QItemDelegate.paint(self, painter, option, index) 
    def setEditorData(self, editor, index): 
     value = index.data(QtCore.Qt.DisplayRole) 
     num = self.items.index(value) 
     editor.setCurrentIndex(num) 
    def setModelData(self, editor, model, index): 
     value = editor.currentText() 
     model.setData(index, QtCore.Qt.DisplayRole, QtCore.QVariant(value)) 
    def updateEditorGeometry(self, editor, option, index): 
     editor.setGeometry(option.rect) 

class Model(QtCore.QAbstractTableModel): 
    def __init__(self, table): 
     super().__init__() 
     self.table = table 
    def rowCount(self, parent): 
     return len(self.table) 
    def columnCount(self, parent): 
     return len(self.table[0]) 
    def flags(self, index): 
     return QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable 
    def data(self, index, role): 
     if role == QtCore.Qt.DisplayRole: 
      return self.table[index.row()][index.column()] 
    def setData(self, index, value, role): 
     if role == QtCore.Qt.EditRole: 
      self.table[index.row()][index.column()] = value 
     return True 

class Main(QtWidgets.QMainWindow): 
    def __init__(self, parent=None): 
     super().__init__(parent) 
     # set combo box choices: 
     choices = ['apple', 'orange', 'banana'] 
     # create table data: 
     table = [] 
     table.append(['A', choices[0]]) 
     table.append(['B', choices[0]]) 
     table.append(['C', choices[0]]) 
     table.append(['D', choices[0]]) 
     # create table view: 
     self.model  = Model(table) 
     self.tableView = QtWidgets.QTableView() 
     self.tableView.setModel(self.model) 
     self.tableView.setItemDelegateForColumn(1, Delegate(self,choices)) 
     # make combo boxes editable with a single-click: 
     for row in range(len(table)): 
      self.tableView.openPersistentEditor(self.model.index(row, 1)) 
     # initialize 
     self.setCentralWidget(self.tableView) 
     self.setWindowTitle('Delegate Test') 
     self.show() 

if __name__ == '__main__': 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    main = Main() 
    app.exec_()